PDF malware analysis — malicious · dfed1297d4764247

MALICIOUS

PDF

49.7 KB Created: 2020-08-30 23:55:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 9c728114e045e7eee8c88839c21523e5 SHA-1: 7e9af580e088e77d2cf6bf918daa642645e684c3 SHA-256: dfed1297d4764247ca8fbef67967f9e94d96f37f10322bb28bfc6728f38e4041

150 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a significant number of external links, with a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK pointing to ttraff.cc. This indicates an attempt to redirect users to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the target URL, reinforcing the malicious redirector finding.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 3

PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK

PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL https://ttraff.cc/wix?keyword=asme+y14.+5+pdf
- https://static.usrfiles.com/ugd/0cd019_386d40dc7cb4489e91c1eccad3757c0e.pdf
- https://static.usrfiles.com/ugd/b8c837_c5c203be6fd04277a123e4f82d50e7ba.pdf
- https://static.usrfiles.com/ugd/05900a_299815ee5fe44893bf18007ed1b3f74a.pdf
- https://static.usrfiles.com/ugd/47b1e8_7ad29451756247b39b37720af977d737.pdf
- https://static.usrfiles.com/ugd/538d67_b9e51623a51f411f98daef081e0e0451.pdf
- https://static.usrfiles.com/ugd/50de67_7892ee10d0724828a5c1cddd559a7a06.pdf
- https://static.usrfiles.com/ugd/b8c837_2dc5fa4aef0642abb8432000f11f9378.pdf
- https://static.usrfiles.com/ugd/b8c837_1ac3c43eabc7466497d2b29eb1063d4c.pdf
- https://static.usrfiles.com/ugd/b8c837_fc25a47a265146d5aba92136afab4e3e.pdf
- https://cdn.shopify.com/s/files/1/0432/7673/0533/files/99985384556.pdf
- https://cdn.shopify.com/s/files/1/0429/5848/7703/files/6546423602.pdf
- https://cdn.shopify.com/s/files/1/0429/3269/9302/files/56474681446.pdf
- https://cdn.shopify.com/s/files/1/0431/6604/0224/files/gastrointestinal_bleeding_management.pdf
- https://cdn.shopify.com/s/files/1/0432/8207/1716/files/megewati.pdf
- https://cdn.shopify.com/s/files/1/0430/7946/7170/files/dojenatuwisisitejo.pdf
- https://cdn.shopify.com/s/files/1/0435/5656/9249/files/baixar_scribd.pdf
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00007646.bin` `8aec272241532ed78c8674553f1be8eb7b8b33a8d0335510fc8258b39222be13`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7646	4092 bytes
`font_01_sfnt_off000084bc.bin` `e1245b93033d2afb0fb9cb48fc76b3d585a1967f4c1ac522170244df453099a5`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x84BC	5236 bytes
`font_02_sfnt_off000096a4.bin` `b2d73850c6d472fcf2267f61ec15084a4b483d5c8b2eacac41d7e30dd8cf0ed9`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x96A4	10292 bytes

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